package com.teach.clone;

public class StudentTest {

	public static void main(String[] args)throws Exception {
		Student s1=null,s2=null,s3=null;
		s1 = new Student("张三",18);
		s2 = s1;
		s2.setName("李四");
//
		
		
		System.out.println(s1);//
		System.out.println(s2);//
		System.out.println(s3);//
		
	
	}
}
